DEVELOPMENT OF THE HEART

This spiraling is responsible for the pulmonary artery and aorta twirling around each other as they emerge from the heart. One side of the truncus arteriosus is the PA, the other side is the Aorta. (The fusion of the truncal septum to the bulbar septum, to the IV septum, to the septum intermedium, to the septum primum/secundum separates the ... ................
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